Nitrogen-vacancy (NV) centers in nanodiamonds have emerged as a promising quantum sensing platform for biomedical imaging applications, yet random orientations of individual particles present significant challenges in large-scale sensor calibration. In this study, we demonstrate a novel approach to simultaneously determine each particle's crystallographic axes and the surrounding local vector magnetic field. Specifically, a minimum of four distinct bias fields is required to unambiguously extract both the orientation and the local field. We validate our method experimentally using NV centers in two scenarios: (1) in a bulk diamond with known crystal orientation as a proof of concept, and (2) on various single nanodiamonds to mimic real-world applications. Our work represents a crucial step towards unlocking the full potential of nanodiamonds for advanced applications such as in-situ biomedical imaging and nanoscale sensing in complex environments.
@article{arxiv.2507.05366,
title = {Simultaneous Determination of Local Magnetic Fields and Sensor Orientation with Nitrogen-Vacancy Centers in Nanodiamond},
author = {Yizhou Wang and Haochen Shen and Zhongyuan Liu and Yue Yu and Shengwang Du and Chong Zu and Chuanwei Zhang},
journal= {arXiv preprint arXiv:2507.05366},
year = {2025}
}
Comments
Main text with 8 pages and 4 figures. Supplementary consists of 9 pages and 4 figures